Re: cold weather problems
Is it all stock? I would recommend cleaning the MAF, cleaning your TPS and seeing how that does, what kind of 02 sensors did you put in the car? I have heard of a lot of people having trouble with the bosch and other aftermarket brand 02's because they relay information to the computer much slower than the factory 02 sensors. If you have access to a dyno shop or know of one it might be very beneficial for you to hook up a wideband sensor to the exhaust and have the tunner data log the car when it does that if you can't figure out the problem on your own. Also if you have a cold air intake with a bend in it before the MAF it could be messing with the turbulence in the intake path and causing your MAF to read funny.
Refs: johnson, flakko, kenny pollock